Rocker Plates for Trainers

That works. I’ll figure something out on travel distance based on a range of at least 3" (or 76.2mm) but no more than 5" it seems (may have to play around with this before I decide what to settle on).

Still gotta figure out the how to control the travel without having to rely on hard stops (although I’ll still have them as a final bail out safety measure though). It might be trial and error in the end with messing with the centering mechanism concept I’ve got and how many springs I use (looking at high tension springs either for furniture or trampolines).

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Lifeline Rocker Plate review
£299.99 £224.99 - Wiggle

Apologies, this is more a stream of consciousness than a well structured review, but I’m not getting paid to write this so you get what you get! Multiple edits were to add pics and correct a litany of typos…

I ordered it on Friday evening 09/10 from Wiggle, it was delivered Monday afternoon on 12/10 – ridiculously fast. Off to a good start, and even the delivery guy used to be a bike mechanic, so had a nice chat. It was well packaged, looked like I’d ordered the world’s biggest piece of parmesan!

What’s included: Main rocker plate (already assembled), 4x inflatable balls (2 spares), hand pump, a load of Velcro straps, miniature spirit level

The next 3 points are about set up – I’ll go into the fine details, so skip ahead if you like. In brief, set up is in theory straightforward enough, but not without a few snags in my case. I don’t agree with some reviews I’ve seen that the instructions were unclear, but I do think they’re quite high-level and not trainer-specific.

Level ground
A lot of the time I spent was getting the rocker to be level on my very slightly sloping and knobbly garage floor. By eye it looked fine straight away, but the spirit level said otherwise, so do consider checking this in case your floor isn’t completely flat. I used some cardboard ‘shims’ that I’d already been using under the feet of my trainer to get the level right (remember to measure the level in several places).

The feet of the rocker are rubber, so they’re good for grip. If the feet were adjustable for height, e.g. screw in/out, that would make life much easier, it’d mean no ghetto fix was needed, and save me having to get on my knees and lift the thing many times getting it right. At least the rocker plate hides the shims underneath, so it does still look neat.

Fixing the trainer on
You then put the trainer on the rocker plate lined up with whichever of the many cut outs is right for your trainer. You loop the adjustable Velcro straps through the rocker plate and around your trainer to secure it. My Tacx Flux 2 can only be fixed in place by its front legs, there’s no way to hold the sloping stubby legs at the back. All contact points of the trainer sit on a textured rubber surface, which seems good for grip. I felt confident quite quickly that the setup was solid and secure – it just doesn’t slip.

The cut outs I had to use resulted in the trainer being a bit left-of-centre, despite the instruction to place the trainer centrally on the rocker plate. It should say to put it ‘as central as you can’, because the cut-outs dictate the position with maybe 3cm of room for manoeuvre (1.5cm each side). This left the flywheel of my Flux 2 a bit off centre, but I guess the longer front and rear legs on the trainer’s right-hand-side are designed to compensate for this physical imbalance. The cut outs for securing the front wheel are in pretty narrow rows either side of the wheel, meaning it’s great for holding the front wheel securely in place. Before getting the rocker, I hated having my front wheel loose on the floor wobbling around. I used a home-made riser partly to keep the wheel still, but also to raise the axle a little for comfort as @mcneese.chad has recommended previously). If you used a riser on this rocker plate, you wouldn’t be able to strap your front wheel down, as the riser would cover the cut outs. To be fair, the rubber surface would probably keep any riser in place well enough by itself. For me, I’ve decided to lose the riser for now, as I wanted to take some pressure off my rear end, and I have some extra cushy bar tape on order, which should help a bit with hand comfort.

Balls up
This was probably the worst part of set up for me. At this point, you should be able to just stick the uninflated ball through the hole in the top of the rocker plate and inflate. There’s also a hole directly below in the bottom plate, so the ball sits still where it needs to once inflated.

The legs of my Flux 2 partially obstructed access to the right-hand hole, and completely covered the left-hand hole – great! Crouching/laying on the floor, I managed to get the balls in place by going between the sides of the plates. Because access to the balls from the top was obstructed, I had to swivel the balls so that the valve holes point outwards. Doing all of this involved lifting the weight of the trainer and top plate to make enough room to get the ball and my arm in, and resulted in some scratched up hands and wrists.

Luckily the flex of the pump is (only) just long enough to reach the ball from the side of the rocker plate. I then picked myself off the floor, got the pump upright and started inflating. The plastic handle of the pump looks flimsy AF, so I took care not to apply any unintended twisting forces or anything while pumping.

The instructions say to inflate to the point that when you step on one side, you’re just able to make the plates touch. You’re also instructed to use the spirit level at this point to make sure the top plate is even. I did all this, but afterwards during a test ride, I felt like I was tipping over to one side. My view is that inflation is highly individual. There’s no pressure gauge on the pump, so just get to a sensible looking baseline and test it. Then put a little air in or take some out until it feels right. What’s right will no doubt differ significantly by trainer and how its weight is distributed, as well as individual preference.

Once the trainer is on the rocker, it makes more sense to me to only use the spirit level after you’ve got your setup feeling right for you. This would only be if you wanted to get pedantic about fine tuning any very minor imbalances. I suppose this could be the sort of thing that could develop into a fit/soreness problem over time if left unchecked. Once I was happy with the feel of my setup, I simply laid the spirit level on a couple of central places on the trainer during a workout and glanced down at it at various points. It tended to show the right-hand side was higher more often that not, so I deflated the ball on the right a little. Rightly or wrongly, I’ve now got it so the bubble in the spirit level stays within the central area, but sways to each edge to mirror the rocking of the trainer as I pedal. I pay no attention to how level it is without me on the bike pedalling.

So how is it?
The first ride ( Boarstone – 2 hours Z2) felt a little harder than expected – it was probably because setting up the rocker plate physically affected me worse than the few strength sessions I’ve done this year. I noticed my cadence was about 10rpm lower than usual to begin with (it eventually returned to normal) – I was probably a little tense and sub-consciously worried about letting loose straight away.

Sensations
I did the first ride just with music, to tried and focus on how it felt. It actually felt good and pretty normal straight away – not exactly like riding out on the road, but much more similar.

Riding out of the saddle is a revelation compared to a static trainer – I’ve done a 1 minute effort, and several 30 second bouts in recent rides including near the end of a 3.5 hour workout. It’s not completely natural, but much closer to being out on the road. Out of the saddle efforts on the static trainer just feel weird to me. The longest I’d mustered previously was 20 seconds, but usually it was 5 or 10 seconds before ‘quad burn’ sets in and I’d have to saddle up.

Looking back at myself with my phone camera, the main thing I notice when riding is how the seatpost seems to sway toward the downward pushing leg. This is stating the obvious, but essentially the trainer is now dynamic – it moves with the input of your body rather than being a static thing with something dynamic on top of it (a recipe for rubbing in my case).

Thrills and spills
The rocking motion doesn’t feel perilous even when deliberately leaning a fair way over. I soon felt happy to take my hands off the bars, sit upright etc. Climbing off the bike is the closest I’ve come to falling over so far. You need to take care – the platform itself isn’t massive, and the rubbery parts of the surface are mainly under the trainer. As we all know, cleats are slippy, so it’d be much nicer if the whole surface was covered with rubber rather than just the trainer contact points.

Comfort
My sole reason for getting a rocker plate was to enhance my comfort on the trainer. I’ve been using TR for about a year now and generally tolerated a bit of butt discomfort. Until now my sit bones would feel achy from pressure after about 30 mins Z2, and I occasionally got a bit of saddle soreness in the perineum which was worse with some of my shorts than others. I started a traditional base plan a few weeks ago, so my riding is suddenly 90% long Z2 – with less pressure on the pedals and more saddle time. After a couple of rides with my old static setup I knew it wasn’t going to be sustainable, so I dialled things to the extent that it wasn’t keeping me from training, but I would always have a sore patch or painful spot here or there (sorry if TMI!).

With the rocker plate, so far I’ve noticed that I am still getting a little discomfort during longer rides, which I think is to be expected, but no pain. I don’t seem to be getting what I assume was rubbing which was causing the soreness before, and it feels like I’m slowly healing up.

In conclusion
Hopefully I’ve conveyed that although there wasn’t much ‘assembly’ involved in getting the rocker plate set up, it was nevertheless a real chore, and it took about 1.5 – 2 hours. Barely being able to reach the inflatable balls with the pump is a pretty bad design flaw in my book, considering this product is supposed to be compatible with the Flux. I’m sure with a different shape of trainer it’s a complete non-issue though.

Moving past setup… it’s early days, but I like riding with this rocker plate a lot so far. It’s delivering more comfort in-ride, and seems to have alleviated my ongoing saddle soreness already. The more natural motion means I can get out of the saddle longer and more often, which also helps with comfort.

I take claims of the rocker helping to improve core stability with a grain of salt. My core ain’t great, my wobbly side planks are testament to that, but holding steady/stable on the rocker plate isn’t a challenge whatsoever. This product won’t make me a better/faster cyclist in itself, but it will let me carry on riding pain free through these cold wet winter months, which hopefully is the same thing.

For the price, it’s easily cheaper than 2 nice pairs of bib shorts or 2 saddles, which you could easily go through in your quest for comfort. Even if it wasn’t needed to fix an issue, I’d be surprised if anyone found using a rocker plate worse than a static trainer. I couldn’t buy the tools and materials to make this product for less, so I’m a happy customer!

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Great write-up. Thanks for sharing!

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Thanks for the review. Sorely tempted to buy one at that price.

Does anyone know if it’s compatible with a H2? The legs are pretty wide on it, and it’s not listed on Wiggle as compatible.

I’d offer to take some measurements, but I’m loathe to move the trainer right now, so probably won’t be able to be very accurate. Always worth a question to Wiggle

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Thanks, I’ll contact them. Looks like a real solid option if it fits👍.

Finally got my fore/aft movement added to my homemade rocker plate. Had several different ideas/concepts to add this to my existing rocker. But after all that I ended up with a hack solution after a light bulb moment. Since I had a set of generic rollers from the previous iteration of Nashbar (no resistance) which I haven’t used in over 5 years I repurposed it as a “conveyor roller track”.

Started with this:

Moved the drums to this configuration (had to drill a few holes in the frame):

After that I added guide feet to the bottom of my rocker plate base to keep it centered and also it acts as hard stops against the roller drum mounting nuts.

Here is the rocker and also end product with my bike on.

For now I used bungee cords for movement control. Total allowable movement based on hard stops is around 5-6 inches. But with the amount of bungees I currently am using it’s more reduced around 4 or so as I’m trying to prevent it hitting the hard stops for most normal efforts. Will eventually put on some actual springs but still gotta figure out what load rating to get to minimize the number needed (was thinking 4 max is preferred). Note if I had a full length rocker setup I probably wouldn’t have need to drill extra holes in my set of rollers. I did leave the front wheel as us since It’s just a cheapo backup I have for trainer use and it moves with the fore/aft movement just fine.

After my first session with it definitely took a bit to get used to it. So far it seems to help a little but more with saddle comfort on top of the rocker tilt. Only drawback to my setup is it added even more height over ground level. Had to raise my front wheel block and step platform even higher. Was really surprised at how much “spring tension” was required to prevent it from moving so easily. The rollers are that smooth.

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First ride on the DIY rocker tonight, not bad for ~£90 with spares leftover. Hard to tell much with just an hour on the road bike but interested to see if it has any impact on the longer TT rides.

Still a few finishing touches to make but testing ball positions and number first. Any opinions on distance from centre line to ball centres? And any benefit to 2 per side instead of 1?

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I am about 6" [150mm] center of pivot to center of ball, with 3.5 psi in a 6" ball.

I like just one per side, to make pressure balancing from left to right easier. 2 per side just adds to the hassle, IMO. Unless you are blowing up balls, I don’t see 4 total as better than 2 total.

Great looking build. Hope to hear what you think during some longer rides. Happy rocking :smiley:

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Thanks Chad, I’ll hopefully have something positive to report after a few sessions but worst case it gave me something to do for a weekend in the current situation :man_shrugging:t2:

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Sorry for slacking. I dropped this and another reply I need to respond to.

Here are some pics of a few setups for inspiration:



image

I can get some plan PDF’s for a few of the designs that are “generic” enough to use. Do you think you want full length or rear only?

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Sorry again for the big delay here.

Consider a wheel-on trainer, viewed from the front or rear.

Left side is fully supported by springs (red coils) and will “bounce” a bit with pedaling motion. It’s like a poorly sprung full suspension MTB.

Right side is similar, but features a rigid center fulcrul (blue triangle serving as a pivot and vertical support) to more directly force a left-right rocking action vs the bounce that can happen with a pure sprung support.

Does that help?

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Totally- thank you!

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I’ve built Chad’s Rockit Launcher and used basic corner braces to stabilize my Direto. It allows to lock it in place by preventing lateral movement, yet you can still easily take it off if you ever need to.

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For legs, a nylon or velcro strap, even an old toe clip strap are good options. Add some small risers to capture the legs to prevent shifting direction and you are set.

Hi Johnnyvee,

I’ve used Chad’s exact measurements and didn’t fiddle with adjusting the plan, which seemed more suited for a Wahoo Kickr. As a result, my Direto’s legs overflow a little bit past the platform. Therefore, the rocker’s footprint is actually smaller than the Direto’s (at least it is if you were to “square” the Direto’s cross-shaped footprint). You will also see the corner braces I’ve used. I have one on each side of every leg.

IMG_1701

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One last quick note. The bike is approximately 5mm off center on the Direto. I used a hanging weight from the center of the down tube to find out. The bike should be centered on the rocker plate, not the trainer. Happy rocking, it will change your trainer rides for the better! :metal:

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Most people seem to use a rocker plate for more comfort, but I was wondering if it’s really beneficial to training, as in using more muscle groups etc. I don’t get uncomfortable on a static trainer even on longer rides (4-5hrs), but I’d consider getting one if it makes indoor training more “natural”.

Per my OP:

So yes, I firmly believe the additional freedom of motion requires more muscle engagement from the rider.

Yup, precisely why I made my first rocker, after a full season on motion rollers.

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